Pneumatic conveyer



Aug. 20, 1935. F. P. BINGMAN Y 2,012,977

PNEUMATIC CONVEYER v vFiled Feb. ze, 1952 2. sheets-smeet 1 ATTORNEY.

Aug. 20, i935. F. P. BINGMAN ZZW PNEUMATIC CONVEYER Filed Feb. 26, 1932 2 Sheets-Sheet 2 BY M f4/M.

ATTORNEY.

l Patented Aug. 20, 15535l @UNI-reo s TArEssigner to` The 1R, C. MahonCompany; Mich., a corporation of liliehigan Y' pplicationlFebruary2.6, 175232, `Ser-ital claims.y c1.3e2-`27 u i `branch pipe connected to opening along basei Inf such case, KVmovement` of n the v material 4This invention relatesto 'pneumatic conveyers for the conveying of Wastematerial from various Y types of machines as,` forv instance, woodworking machines andfdischargingthe sameat some dei *55 sired Apoint of accumulation usually to what is termed aldust collector. i"

It isheretoforefcomnionin theart to provide aA conveyer duct or main conduit to Whichbran'ch. 4. pipes leading from the machines productive of l`the Waste material discharge, an exhaust ian-ba ing provided at `one end ofthe" conveyer for causing the waste 'materialand air to flow from the machine'through the branch pipe andthence through the mainconduit and'exhaustfan'to' place of deposition.'

vSomeundesirable features exist in vsuch vprior known structures .inthat the material discharg' ing through the'branch' pipes Vintotheconi'leyer or mainA conduitjis" discharged usuallyftrans- A` versely` of the'main conduit and, While' thewaste i material and air discharging through the branch4 conduit'may ovv vat'considerablespeed. the velocity of movement is practicallydestroyed due Y to the materialstriking thefoppositewall or side 25 of Vthe main *conduit from thatfthroughl which. the; discharg'epipe opens fand tothe change in direction of movement ofthe air'stream upon entering the main conduit'gu The material therefore tends to fallend pile up in the bottom of 3ogtheconduit.`

'This iriventionseeksto provide a constructionv and arrangement of partsY in which the' materialv ladenair is not changed in( its 'generaldirectinr of. travel upon entering the jmainconduitand". '35*y the material is fhopped nalong'the bottom "of said conduit bysuccessive propelling impulses ofvl f air Vor *material laden.v airv entering the lsuccessive openings provided in the bottom of the conduit. `lItis'further an objectand feature `of this in- 40'kr vention to providea mainl conduit havingA ajbaspe portionoccupying practically a horizontal planeV andthe.provision in vthe said base of a series ofY openings spaced vlongitudinally.'thereof' to 4at least some of which the vdisel'iarge pipes from"VV 451Y the machinesare connected and discharge into'. themain conduit by iniiuence of an exhaustl fan'hav'ing an intake at'one end thereof.

Dueto the' fact that a number'of the Vbranch pipes discharging to a main conduit of this charf acter in ajplantis variedfrom time to time either' by reason of -thefaddition'of a number of machines to be connected with themain conduit Fig'. lis a side elevationalview of one'fc'irrn of Detria l Y along,V the basel between branch pipes lthat are by alonefentering'gthe openings in thebase Y 5 between the points of `entrance of materialladen airY thereinto Vto "ifiaintain movement of lthe material along 'the'b'asei fromY point to point.. until the material comes vto Within the influence ofl the material 'laden air flowing through the `next 1o branch" pipe VLof `the' series.A 'Provisionfis also madel for closing any/fof the openings inthevbase of ythe conduit and'it is .a feature andgolo'iect'fof this Yinvention tofprovide avconduit of substan-v. 1 tially uniform cross sectional area.Y from end to 15 end havinga series offopenings in 'the- Abase spaced longitudinally thereof thru' which air:Y

may'flow and "to some fof openings branch conduits'fcarryingf'material laden'air' are fconnected to discharg'einto the main conduit. g 20 'd Itl is also a' feature of theinvention to provide y a means for closing any of the branch conduitslV Vleading'fronji the machines from` which it visfdei"V Ysiredi toremove Waste material 'produced by op eration thereof -and 'to open an .aperture to at`- '25 movsphere Wherelcy` inthe event` of 'cessationk of operation oi the machine associated withV such. conduitthe continuity'of iioW` 'of'inaterial along"` Y the` bottomfor base of thezconduit is n-otaffected.

Another `object of the invention resides in the 3o provisionbf a conveyerjof this' character in which more or'less discharge'conduits may be provided" thereintwithout detracting from the'eiilciencyof op'eration'thereof. .c f fz;

These objects" .and the Aseveralnovellr features 35 .of jthe inventionare"hereinafter'more fully del scribed andclaimed" and the preferred form of eonstruc'tionby which L these objects are attained shownV in thel accompanying' drawings in" conveyed I Y.

2A is 'a section taken on line '2--2 of- Fig. 1.

Fig. 3 is a section taken'on' line 3 3 oflFig. 2. l'1-"'ig.l is a-view'fsimilar toFig. 2 showing a; modi 45 iiied formof construction. N Figf is a vieW` similar to.-`Fi'g. -lshowing a v v modiedorm of'.con'structioi'1.l

Fig. 6 is a similarv'view showin'ganother modi-* iiedfforinjof construction. Y j' Y 50 Fig l'7* is'an' enlarged vlongitudirial 'verticalsec shoW'ninvFigs, 5'andy,6." y Y "Referring 'to`the`drawingsshown in Figs 1, 2`

f tional` vietv through theA bottom of *theA conveyenrs" and 3 the'conduit l'zhas;,approximatelythe `seline`55fl conduit for drawing the material and air into and, discharging the same from the con-duit, the

branch pipes providing the solemeans for adopening in the base for discharging jmaterial vladen air into the conduit, one end of the` conduit closed, means at the opposite end forfdrawplurality of openings, the -ibaseofthe pipe between the successivev openings being inclinedrto the longitudinal axis of the pipe providing a saw Vtooth form, a plurality of branch pipes, one connected to each opening inthe base for discharging material laden air into the conduit, the arrangement of the branch pipes and openings in the base of the conduit being such that the branch pipes each discharge into the conduit parallel with the adjacent inclined .base portionand in the ,same direction at a slight angle to the longitudinal axis of the conduit, one end of the conduit closed, means at the opposite end of the mitting "air to the conduit.

3. In apneumatic conveyer, aconduit of substantiallyuniform cross sectional areathroughout its length, the base of the conduitiprovided with a pluralityfof vertically extending apertures,

the sections ofthe base between the apertures sloping upwardly from the bottom of onefaperture to 'the top of the next succeeding aperture, a

plurality ofbranch pipes connected to the openings in the base, of the conduit for discharging material laden air-intothe conduit, andfmeansf for causing a reductionf of pressure within the conduit to thereby cause flow of air and ma`` terial through the pipes whereby a stratum of rapidly moving air is pro-vided at the base of the conduit to carry the material therethrough.

` 4. In a pneumatic conveyer, a conduit, ofsubstantially uniform cross sectional area throughout its length, the base thereof provided with a plurality of openings, the sections of the base between the openings sloping upwardly from one opening to the next succeeding opening in suc-r cession providing a base offsaw tooth form, a plurality ofv branch pipes one connected to each ing the material and air into and discharging the,

- same from the conduit, the branch pipes providing thesole means for admitting air to the conduit; l t

5. .In a pneumatic conveyer, a conduit having a 'base portion A'provided with a'plurality ofr aper- 7 tures approximately equi-distantly spaced longitudinally of the co-nduit, a series of branch pipes each being connected to an aperture to discharge into the base of the conduit in a direction approximately longitudinally thereof, said Vbranch pipes being associated at theopposite ends with a `source of supply of waste material and air, the

base of the conduit between each ofthe openings in succession being upwardly inclined from the charged into the-conduit is moved along the base thereof` from one point of inflow of material and impulses to the fan. f

V25r air to another .to convey the'same by successive .Y

6. In a pneumatic` conveyer, a hollow conduitV of substantially uniform cross sectional: areaA throughout its length, theV base of the conduit having a plurality of apertures in spaced relation longitudinally thereof, thewall of the conduitv from one aperture tothe next being inclined upwardly toward thelongitudinal axis thereof, pipes for conveying waste material tothe conduit each connected with an aperture at the bottom of the conduit, Yand means for causing reductionof prese sure within the conduit and thesaid pipes to cause movement of waste material through the conduit.

- FREDERICK P.`BINGMAN. 

